摘要：

针对超高含硫气田碱性采出水的特性和处理应达到的要求,对水质改性、氮气气浮、H₂O₂预氧化、沉淀复合除硫加絮凝净化处理工艺技术进行了研究。结果表明:当盐酸投加量为2.0～2.5 mL/L,pH控制6.0～6.5,溶气比控制为20:1,气浮初级除硫可将硫离子质量浓度由2 500 mg/L降至400 mg/L,后续H₂O₂投加量2.5～3.0 mL/L,最佳反应时间15 min,20%沉淀除硫剂ZS-1投加量为2.0 mL/L,20%絮凝剂L-12、0.1%PAM投加量均为1.0 mL/L时,处理水质可达到回注设计要求。

关键词: 碱性采出水, 超高含硫, 复合除硫, 净化

Abstract:

According to the characteristics of high sulfur gas field alkaline produced water and treatment requirements,this paper has studyed the waste water treatment processes with modification,removing sulfur by primary nitrogen gas flotation and preoxidation with H₂O₂ and then sedimentation with ZS-1,adding with flocculating purification. The results show that sulfur ions can be reduced to 400 mg/L from 2 500 mg/L by elementary floating,controling the ratio of gas to water abuout 20 and the pH value from 6.0 to 6.5 with dosage of hydrochloric acid from 2.0 to 2.5 mL/L,then keeping the dosage of 30% H₂O₂ from 2.5 to 3.0 mL/L with the optimum reaction time 15 min and subsepuent dosage of 20% precipitation type agent ZS-1 about 2.0 mL/L,after flocculating with 1.0 mL/L 20% flocculating agent L-12,1.0 mL/L 0.1% PAM,the treated water can meet the requirements of water reinjection design.

Key words: alkaline produced water, high sulfur ions, combined technology of removing sulfur ions, purification

中图分类号: 

• X703.1